Question

Key concept of Darwinian theory of evolution–

Answer 1

Answer:

Key concept on which Darwinian theory of evolution is based are Branching descent and natural selection.

Natural selection may be defined as the process by which the organisms which are better adaptive to a particular kind of environment tends to survive, leading in the elimination of the organism less adaptive to that environment.

Branching descent may be defined as the process by which new species originate from a single common descendant. 

So, the correct option is 'Branching descent and natural selection'.